const spawn = require('child_process').spawn;
const fs = require('fs-extra');
const path = require('path');
const tar = require('tar');
const argv = require('minimist')(
    process.argv.slice(2), {
        // Specify that these arguments should be a string
        "string": ["version", "runtime", "abi"]
    }
);
const pkg = require('./package.json');
const nodeAbi = require('node-abi')
const { optionsFromPackage } = require('./helpers');

let arch = process.env.ARCH
  ? process.env.ARCH
    .replace('i686', 'ia32')
    .replace('x86_64', 'x64')
  : process.arch;

let gypJsPath = path.join(
  __dirname,
  'node_modules',
  '.bin',
  process.platform === 'win32' ? 'node-gyp.cmd' : 'node-gyp'
);

let files = [];
let targets;
let chain = Promise.resolve();

initBuild();

function initBuild() {
  // Check if a specific runtime has been specified from the command line
  if ("runtime" in argv && "version" in argv && "abi" in argv) {
      targets = [[argv["runtime"],
      argv["version"],
      argv["abi"]]];
  } else if ("all" in argv) {
      // If "--all", use those defined in package.json
      targets = require('./package.json').supportedTargets;
  } else {
    const options = optionsFromPackage();
    if (process.env.npm_config_targets) {
      options.targets = options.targets.concat(process.env.npm_config_targets.split(','));
    }
    options.targets = options.targets.map(targetStr => targetStr.split('-'));
    if (process.env.npm_config_targets === 'all') {
      options.targets = supportedTargets.map(arr => [arr[0], arr[2]]);
      options.platforms = ['win32', 'darwin', 'linux'];
      options.arches = ['x64', 'ia32']
    }
    if (process.env.npm_config_platforms) {
      options.platforms = options.platforms.concat(process.env.npm_config_platforms.split(','));
    }
    if (process.env.npm_config_arches) {
      options.arches = options.arches.concat(process.env.npm_config_arches.split(','));
    }

    if (options.targets.length > 0) {
      targets = options.targets.map(e => ([e[0], nodeAbi.getTarget(e[1], e[0]), e[1], ]))
    } else {
      const runtime = process.versions['electron'] ? 'electron' : 'node';
      const version = process.versions.node;
      const abi = process.versions.modules;
      targets = [[runtime, version, abi]]
    }
  }

  targets.forEach(parts => {
    let runtime = parts[0];
    let version = parts[1];
    let abi = parts[2]
    chain = chain
      .then(function () {
        return build(runtime, version, abi)
      })
      .then(function () {
        return tarGz(runtime, abi)
      })
      .catch(err => {
        console.error(err);
        process.exit(1);
      })
  });

  chain = chain.then(function () {
    if ("upload" in argv && argv["upload"] === 'false') {
      // If no upload has been specified, don't attempt to upload
      return;
    }

    return uploadFiles(files)
  });

  cpGyp();
}

function cpGyp() {
  try {
    fs.unlinkSync(path.join(__dirname, 'binding.gyp'));
    fs.unlinkSync(path.join(__dirname, 'uiohook.gyp'));
  } catch(e) {
  }
  switch (process.platform) {
    case 'win32':
    case 'darwin':
      fs.copySync(path.join(__dirname, 'build_def', process.platform, 'binding.gyp'), path.join(__dirname, 'binding.gyp'));
      fs.copySync(path.join(__dirname, 'build_def', process.platform, 'uiohook.gyp'), path.join(__dirname, 'uiohook.gyp'));
      break;
    default:
      fs.copySync(path.join(__dirname, 'build_def', 'linux', 'binding.gyp'), path.join(__dirname, 'binding.gyp'));
      fs.copySync(path.join(__dirname, 'build_def', 'linux', 'uiohook.gyp'), path.join(__dirname, 'uiohook.gyp'));
      break;
  }
}

function build(runtime, version, abi) {
  return new Promise(function (resolve, reject) {
  let args = [
      'configure', 'rebuild',
      '--target=' + version,
      '--arch=' + arch
  ];

    if (/^electron/i.test(runtime)) {
    args.push('--dist-url=https://atom.io/download/electron');
    }

    if (parseInt(abi) >= 80) {
      if (arch === "x64") {
      args.push('--v8_enable_pointer_compression=1');
      } else {
      args.push('--v8_enable_pointer_compression=0');
      args.push('--v8_enable_31bit_smis_on_64bit_arch=1');
      }
    }
    if (process.platform !== "win32") {
      if (parseInt(abi) >= 64) {
      args.push('--build_v8_with_gn=false');
      }
      if (parseInt(abi) >= 67) {
      args.push('--enable_lto=false');
      }
    }

    console.log('Building iohook for ' + runtime + ' v' + version + '>>>>');
  if (process.platform === 'win32') {
    if (version.split('.')[0] >= 4) {
      process.env.msvs_toolset = 15
      process.env.msvs_version = 2017
    } else {
      process.env.msvs_toolset = 12
      process.env.msvs_version = 2013
    }
    args.push('--msvs_version=' + process.env.msvs_version);
  } else {
    process.env.gyp_iohook_runtime = runtime;
    process.env.gyp_iohook_abi = abi;
    process.env.gyp_iohook_platform = process.platform;
    process.env.gyp_iohook_arch = arch;
  }

    let proc = spawn(gypJsPath, args, {
      env: process.env
    });
    proc.stdout.pipe(process.stdout);
    proc.stderr.pipe(process.stderr);
    proc.on('exit', function (code, sig) {
      if (code === 1) {
        return reject(new Error('Failed to build...'))
      }
      resolve()
    })
  })
}

function tarGz(runtime, abi) {
  const FILES_TO_ARCHIVE = {
    "win32": ['build/Release/iohook.node', 'build/Release/uiohook.dll'],
    "linux": ['build/Release/iohook.node', 'build/Release/uiohook.so'],
    "darwin": ['build/Release/iohook.node', 'build/Release/uiohook.dylib'],
  }
  const tarPath = 'prebuilds/' + pkg.name + '-v' + pkg.version + '-' + runtime + '-v' + abi + '-' + process.platform + '-' + arch + '.tar.gz';

  files.push(tarPath)

  if (!fs.existsSync(path.dirname(tarPath))) {
  fs.mkdirSync(path.dirname(tarPath));
  }

  tar.c(
    {
      gzip: true,
      file: tarPath,
      sync: true,
    },
    FILES_TO_ARCHIVE[process.platform],
  );
}

function uploadFiles (files) {
  const upload = require('prebuild/upload');
  return new Promise(function (resolve, reject) {
    console.log('Uploading ' + files.length + ' prebuilds(s) to Github releases');
    let opts = {
      pkg: pkg,
      files: files,
      upload: process.env.GITHUB_ACCESS_TOKEN
    };
    upload(opts, function (err, result) {
      if (err) {
        return reject(err);
      }
      console.log('Found ' + result.old.length + ' prebuild(s) on Github');
      if (result.old.length) {
        result.old.forEach(function (build) {
          console.log('-> ' + build)
        })
      }
      console.log('Uploaded ' + result.new.length + ' new prebuild(s) to Github');
      if (result.new.length) {
        result.new.forEach(function (build) {
          console.log('-> ' + build)
        })
      }
      resolve()
    })
  })
}
